Also apparently one female ended six relationships in a single year, and the staff description of her, translated from Japanese, is something like "basically demonic."

And yes, some penguins have developed crushes on their caretakers. Which the aquarium has also charted. Professionally.

Festivals:

    - Tsuzumi = drum used in festivals
    - Taiko = drum used in festivals
    - Happi = clothes worn in festivals
    - Wasshoi = shout used in festivals
    - Hanabi = fireworks
    - Matsuri = festival
    - Chouchin = latern used in festivals
    - Bonbori = type of light used in hina festival
    

    - Monaka = bean paste filled snack
    - Ichigo = strawberry
    - Basil = culinary plant
    - Momoha = maybe derived from momonoha, which is a culinary plant
    - Peach = fruit
    - Akebi = fruit
    - Omochi = snack
    - Chanko = hot pot
    - Fuji = apple
    - Melon = fruit
    - Ohagi = snack
    - Sour = flavor
    - Yuzu = fruit
    - Ponzu sauce
    - Ramune = drink
    - Warabi = type of mochi
    - Yomogi = type of mochi
    - Daifuku = snack
    - Cookie = cookie
    - Ringo = apple
    - Potechi = potato chips
    - Cherry = fruit
    - Lime = fruit
    - Marron = chestnut
    - Kinako = soybean flour
    - Banana = fruit
    - Zunda = paste made from edamame
    - Suika = watermelon
    - Shiratama = snack
    - Cocoa = cocoa
    - Ame = candy
    - Choco = chocolate
    - Arare = snack
    - Anmitsu = bean paste snack
    - Anko = bean paste
    - Anzu = fruit
    - Macaron = snack
    - Koume = plum
    

    - Pine = tree
    - Momiji = maple
    - Susuki = tree
    - Rose = flower
    - Tsumugi = flower
    - Nadeshiko = flower
    - Sakura = flower
    - Komari = flower
    - Aloe = plant
    - Ajisai = flower
    - Kiriko = flower
    - Azuma = plant

[1] https://www.sumida-aquarium.com/special/sokanzu/

Also this article is just great.